#include <iostream>
#include <string>

using lint = long long;

void solve() {
    std::string s;
    std::cin >> s;

    lint x = 0, y = 0, ans = 0;
    for (char c : s) {
        if (c == 'c') ++x;
        if (c == 'w') {
            ans += y;
            y += x;
        }
    }

    std::cout << ans << std::endl;
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}